Trimming and cleaning attachment.



A. L. TRAVBR.

TRIMMING AND CLEANING ATTACHMENT.

APPLICATION FILED SEPT.24, 1913.

Patented Nov. 3, 1914.

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A. L. TRAVER.

TRIMMING AND CLEANING ATTACHMENT.

APPLICATION FILED SEPT.24, 1913.

Patented Nov. 3, 1914.

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A. L. TRAVER.

TRIMMING AND CLEANING ATTACHMENT APPLICATION FILED SBPT.24, 1913.

Patented Nov. 3, 1914.

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UNTTED STATES PATENT FFTCE.

ADELBERT L. TRAVER, OF PHILIYIONT, NEW YORK, ASSIGNOR TO AMERICANRAVELLER C0.. OF PHILMONT, NEW YORK, A CORPORATION OF NEW YORK.

TRIIVIMING .AND CLEANING ATTACHMENT.

Specification of Letters Patent.

Patented Nov. 3, 19141.

Application filed September` 24, 1913. Serial No. 791,665.

T0 all 'whom t may concern.'

Be it known that I, Annnnnn'r L. Tnavrm, a citizen of the United States,residing at Ihilmont, in the county of Columbia and State of New York,have invented new and useful Improvements in Trimming and CleaningAttachments, of which the following is a specification.

The invention relates to a trimming and cleaning attachment, and moreparticularly to the class of trimming attachments with an oscillatorycleaning brush for use on seaming or looping machines, the attachmentbeing especially designed to be applied to the improved looping machineforming the subject matter of Letters Patent No. 1,054,724, issued March4;, 1913.

The primary object of the invention is the provision of an attachment ofthis character wherein the seams of hosiery and knit underwear formedfrom looped fabric may be trimmed and cleaned prior to the uniting ofthe seams while the sewing machine is in operation, thereby cutting thesurplus knitted fabrics and cleaning out the half stitches so that asthe work enters the sewing `needle and is sewed there is no surpluswaste left in the fabric when sewed together, and in this manneravoiding ridges at the seams of the finished article.

Another object of the invention is the pro vision of an attachment ofthis character wherein the same can be mounted upon the machine forsewing looped fabrics so that on unitingthe fabrics thereby the seamsproduced will be trimmed and the surplus threads or loops will beremoved under the action of the brush which serves to clean the seams,thereby avoiding ridges at any point of the same. i

A further object of the invention is the provision of an attachment ofthis character wherein the brush and knife are actuated in a novelmanner simultaneously with the working of the machine 4for sewing thelooped fabrics together, the attachment being of novel construction toassure the perfect trimming of the fabrics at the seams and for cleaningsuch seams to remove waste threads or loops therefrom.

A still further object of the invention is the provision of anattachment of this character which is extremely simple in construction,thoroughly reliable and eiicient in operation, and inexpensive inmanufacture.

lVith these and other objects in view, the

invention consists in the construction, eombination and arrangement ofparts as will showing the attachment constructed in aci corda-nce withthe invention applied. Fig. 2 is a front elevation thereof. Fig. 3 is avertical transverse sectional view on the line 3-3 of Fig. 1. Fig. l `isa bottom plan view of the attachment. Fig. 5 is a sectional view on theline 5-5 of Fig. 3. Fig. G is a view similar to Fig. 2, looking towardthe opposite side of the attachment. Fig. 7 is a per.- spective view ofthe trimming knife and stem.

Similar reference characters indicate corresponding parts throughout theseveral views in the drawings.

Referring to the drawings in detail, the attachment comprises a bracket10 which is bolted or otherwise fixed to the head A of the machine forsewing looped fabrics, the details of which are set forth in LettersPatent hereinbefore referred to, the head being supported by the arm Bof the frame C of the machine, and rotatable on said head is the pointcylinder D having the peripherally disposed points E upon which thelooped fabrics are impelled in the usual manner. This point cylinder I)is rotated through the medium of connections with a horizontal shaft Fwhich is driven by means of a belt pulley G carried thereby. Formed onthe bracket 10 is a boss or stud 11 on which is engaged the intermediateeye 12 formed on a. supporting arm 13 which is provided with outer eyeterminals 14 and 15, the stud 11 being formed with a groove 16 in whichengages a set screw 17, the latter being threaded in the eye 12 so as tolock the arm 13 thereon against swinging movement.

Formed on the outer eye terminal 15 is a yoke or crane 18, whilerotatably and slidably fitted in the said eye terminal 15 is a knifecarrying stem or shaft 19, thesame being also rotatably and slidablyfitted in a bearing 20 formed on the crane 18 in alinement with the eyeterminal 15, the stem or shaft 19 being fitted at its lower end with atrimming knife 21, the latter being detachably connectedto a foot 22formed with a ico sleeve 23 adapted to surround the stein or shaft 19,and carries a set screw 24 which locks the sleeve thereon.

Carried by the other eye terminal le of the arm 13 is a gear casingwhich is formed with a hollow stem 26 fitted in the eye terminal la andheld fast therein by means of a set screw 27 carried by the terminal.Passed through the hollow stem 26 is an oscillating shaft 28 havingfixed theretoa beveled gear 29 adapted to work within the casing 25, andwith this gear meshes a beveled pinion 30 fixed to a rotatable brushcarrying shaft 3i which is supported in slidable and rocking bearings 32and 33 respectively, the casing being cut away in its side wall to forma space for the rocking bearing 33 which is supported upon pivots Sltadjustably mounted in out-turned wings 35 integral with the side walland at opposite sides of the cut away portion therein, while the slidingbearing 32 is held within guideway 3G formed in the side wail of thecasing diametrically opposite the cut away portion therein. rfhe slidingbearing is of the split type which are formed with extensions 37providing a sleeve on which is fitted the hub portion 38 of a hood 39for the cleaning brush 4:0 which is detachably fixed' to the end of theshaft 31 extended within the hood 39. Rising from the casing 25 abovethe guideway 36 are posts 4l supporting a cross plate i2 through whichworks an adjusting screw lf3, the upper threaded end le of which isengaged by a knurled adjusting nut which works against the plate e2, thescrew being extended between the posts el and is swiveled in anysuitable manner in the sliding bearing so that the brush can be adjustedwith relation to the point cylinder D of the sewinfr machine.Surrounding the screw 413 is a coiled expansion spring 46, one end ofwhich works against a Cotter pin 47 engaged in the screw, and itsopposite end works against the plate 42, the spring being designed toact as a tensioning device on the screw when being lowered on adjustmentof the nut i5 threaded thereon. |the hub portion 98 of the hood 39carries a set screw i8 which engages the sleeve 37 to prevent theturning of the hood and permits the proper adjustment thereof.

Suitably fixed to the shaft 28 at the upper end thereof is a lever 49,while xed to the knife carrying shaft or stem 19 -is a lever 50, thelatter being connected to the said lever 1i9 through the medium of link51 so that the said levers will workin unison.

The lever i9 has connected thereto by means of a universal joint 52 anoperating rod 53, the same being also eccentrically connected by meansof a universal joint to a rotatable disk 55 centrally fixed to thedriving shaft F of the sewing machine so knife 2l and the brush i()simultaneously with each other.

At one side of the bracket 10 is adjustably connected a foot 56supporting a guide plate 57 which is arranged vertically at one side ofthe knife 2l and is of the shape shown to deflect the trimmings severedby the knife from the looped fabrics which is united or stitchedtogether during the operation of the machine for sewing the said fabricstogether, it being understood of course that the point cylinder D ofthey said machine is actuated whereby a step by step rotary movement isimparted thereto while the machine is in operation. rllhe foot 56 isformed with a bifurcation 5S in which engages a threaded stud 59 carriedby the bracket l0, the latter being formed with a guide rib v60 whichengages in a guideway 6l formed in the inner side of the bifurcatedportion 5S of the foot so as to prevent the twisting of the latter whenadjusted. rPhe bifurcated portion 58 of the foot carries anotched plate62 adapted to vstraddle an adjusting screw 68 having a threaded innerend dei engaged in the stud 59, the screw G3 being formed with a reducedportion G5 engaging the notch in the plate 69. and thereby aii'ording aswivel connection for the screw with the foot so that the latter can bevertically adjusted on the turning of the screw. This foot 5G is lockedin adjusted position by means of a binding nut 6G threaded on the stud59, and in this manner the plate 57 can be held in adjusted relation tothe knife for throwing oi'f the trimmings cut thereby from the loopedfabric carried by the point cylinder D of the machine.

rihe foot 56 carries a shearing plate or shoe 67 which co-acts with theknife for the cutting of the looped fabrics when trimming the same, thebrush being designed to clean the seam after the fabrics have beenstitched together or united sov as to remove waste vthreads or halfloops therefrom re# sultant from cutting the fabrics by the knife 2lduring the working of the attachment.

Loosely surroundingthe stem. or shaft 19 between the eye terminal l5 ofthe arm 13 and the lever 50, is a collar 68 formed with nibs the latteradapted to work upon the upper edge of the eye terminal lo for liftingthe knife a predetermined distance. the nibs G9 being designed to engageiniio-tches 70 formed in the eye terminal l5 when the knife has beenlowered so as to prevent the turning of the collar 68. The said knife isheld in lowered position through the medium of a coiled expansion spring7l surrounding the stem or shaft i9 between the lever 50 and the bearing20 of the crane 1S.

During the operation of the sewing machine the trimming and cleaningattachment will be simultaneously actuated so that the knife 2l willoscillate and likewise the brush 40 whereby the knife will cut thesurplus in the fabrics held by the point cylinder, and subsequentthereto the brush will clean the fabrics to remove waste threads orloops cut by the knife prior to the uniting of the fabrics, and in thismanner the seamed or looped fabrics will be trimmed at the seams andsuch seams will be cleaned or the surplus stitches removed so as toavoid the formation of ridges and to prevent surplus waste left in thefabric when sewed together.

From the foregoing it is thought that the construction and manner ofoperation of the device will be clearly understood, and therefore a moreextended explanation has been omitted.

What is claimed is l. The combination with a sewing machine having ahead, of a trimming and cleaning attachment comprising a bracket fixedto the head, a supporting arm mounted upon the bracket and having eyeterminals, means for locking the supporting arm against swingingmovement, a. crane formed on one of the eye terminals, a knife carryingstaff journaled in the crane and the eye terminal supporting the same, agear casing carried by the other eye terminal and having a hollow stem,a beveled gear within the said casing and having a shaft projectedthrough the hollow stem, a brush carrying staff at right angles to thegear shaft, slidable and rocking bearings mounted in the casing and supporting the brush carrying shaft, means for adjusting the slidablebearing, a pinion on the brush carrying shaft and meshing with the gear,a circular brush mounted on the said brush carrying shaft, a hoodsupported by the sliding bearing and partially inclosing the said brush,and operatively connected levers and links having connection with theknife carrying staff and gear shaft and actuated by the sewing machinefor reversely rotating the brush and reciprocating the knifesimultzlneously with each other.

2. The combination with a sewing machine having a head, of a trimmingand cleaning attachment comprising a bracket fixed to the head, asupporting arm mounted upon the bracket and having eye terminals, meansfor locking the supporting arm against swinging movement, a crane formedon one of the eye terminals, a knife carrying staff journaled in thecrane and the eye terminal supporting the same, a gear casing carried bythe other eye terminal and having a hollow stem, a beveled gear withinthe said casing and having a shaft projected through the hollow stem, abrush carrying staff at right angles to lthe gear shaft, slidable androcking bearings mounted in the casing and supporting the brush carryingshaft, means for adjusting the slidable bearing, a pinion on the brushcarrying shaft and meshing with the gear, a circular brush mounted onthe said brush carryingshaft, a hood supported by the sliding bearingand partially inclosing the said brush, operatively connected levers andlinks having connection with the knife carrying staff and gear shaft andactuated by the sewing machine for reversely rotating the brush andreciprocating the knife simultaneously with each other, and a deflectorguard plate vertically disposed at one side of the knife and adjustablyconnected to the bracket.

3. The combination with a sewing machine having a head, of a trimmingand cleaning attachment comprising a bracket fixed to the head, asupporting arm mounted upon the bracket and having eye terminals, meansfor locking the supporting arm against swinging movement, a crane formedon one of the eye terminals, a knife carrying staff jonrnaled in thecrane and the eye terminal supporting the same, a gear casing carried bythe other eye terminal and having a hollow stem, a beveled gear withinthe said casing and having a shaft projected through the hollow stem, abrush carrying staff at right angles `to the gear shaft, slidable androcking bearings mounted in the casing and supporting the brush carryingshaft, means for adjustingithe slidable bearing, a pinion on the brushcarrying shaft and meshing with the gear, a circular brush mounted onthe said brush carrying shaft, a hood supported by the sliding bearingand partially inclosing the said brush, ope 'atively connected leversand links having connection with the knife carrying staff and gear shaftand actuated by the sewing machine for reversely rotating the brush andreciprocating the knife simultaneously with each other, a deflectorguard plate vertically disposed at one side of the knife and adjustahly`connected to the bracket, and means connected with the knife carryingstaff and coperative with the crane for adjusting the knife to raised orlowered position.

ln testimony whereof I aliix my signature in presence of two witnesses.

G-nonon OHARA, Fimo TnAvnn.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents.

Washington, D.` C.

